Diggi is another version of "digga", which can be either used as an alternative to bro/dude/mate or to express how you feel about the current situation. Diggi is often used by soft/wholesome/cute people.
Diggi i fucking love you
A frantic dance a Geordie does when he has held it in too long. This usually occurs after one too many brown ales and a failure to visit the water fall grotto before leaving the pub or when small children have a sudden need to go.
(Mam) ..."Tommy is doing a diggy dance. Best get him to the toilet before he wets his pants!"
The ship between David Bowie and Iggy Pop.
I ship Diggy Bop... Who do you ship?!
a dance where you act like your digging through dog shit on the ground
hey everyone lets do the diggy it's pretty cool
The act of stopping and digging straight down in order for refuge or resources (Minecraft and real life)
I was being chased so I had to do a diggy down to hide.